View Compilation Error

0_0_8633890_17495.cpp:1:9: #include expects "FILENAME" or <FILENAME>
0_0_8633890_17495.cpp:2:9: #include expects "FILENAME" or <FILENAME>
0_0_8633890_17495.cpp: In function `int main()':
0_0_8633890_17495.cpp:34: error: `scanf' undeclared (first use this function)
0_0_8633890_17495.cpp:34: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_8633890_17495.cpp:37: error: `memset' undeclared (first use this function)
0_0_8633890_17495.cpp:38: error: `printf' undeclared (first use this function)